Rod-connecting device for type-writing machines



(No Model.) 4 J. M. FAIRPIE-LD.

ROD CONNECTING DEVICE FOR TYPE WRITING MACHINES. No. 536,027.

Patented Mar. 19, 1895.

Wilhesses UNITED STATES PATENT OFFICE.

JOHN M.. FAIRFIELD, OF HARTFORD, CONNECTICUT.

SPECIFICATION forming part of Letters Patent No. 536,027, dated March19,1895.

Application filed March 3, 1894. Serial No. 502,275- (No model.)

To whom it may concern;

Be it known that 1, JOHN M. FAIYRFIELD, a citizen of the United States,residing at Hartford,in the county of Hartford and State of Connecticut,have invented certain new and useful Improvements in Connecting Devices,of which the following is a specification.

This invention relates to connecting-devices especially adapted for usein type-writers; the object of the invention being to provide improvedmeans whereby two members, as for instance, the connecting-rod of atype-bar and a key-lever of a type-writer, may be readilysecuredtogether without the use of screws,

rivets, or other devices commonly employed for such purposes, andwhereby the said members will be firmly held against accidentaldisplacement, and may be quick] y disconnected without the employment oftools for that purpose; also to so construct said parts that the samemay be cheaply manufactured and will be simple and durable, andeffective for their intended purpose.

In the drawings accompanying and forming a part of this specification,Figure 1 is a side elevation of two members, 2'. e.a key-lever andportion of a type-bar connecting-rod of a type-writer constructed andconnected together in accordance with my invention. Fig. 2 is a planview of the same. Fig. 3 is a side view ofthe lower end of a type-barconnecting-rod showing the locking-device slid upward out of itslocking-position. Fig. 4 is a rear elevation, partially in section,looking from the right hand in Fig. 1, of the two members and thelocking device therefor. Fig. 5 is a sectional side elevation of thesame showing the locking device in its locking position. Figs. 6 and 7are front and side views, respectively, of a modified form of connectingdevice.

Similar characters designate like parts in all the figures.

Briefly stated, my improvements comprise two members having overlappingends in looking engagement one with the other, and a lock shiftablycarried by one of said members and adapted for engagement with the otherof said members to retain the two members in locked engagement, as willbe hereinafter more fully described.

In the form thereof herein shown, the two members which are connected inaccordance with my invention, comprise the arm B of the key-lever 2, andthe connecting-rod C of the type-bar (not shown) of a type-writingmachine. It will be obvious however, that my improvements are applicableto other connecting-rods than those herein shown.

In practice, the key-lever 2 herein shown will preferably be constructedof sheet-metal of suitable thickness and have the usualfinger-piece,orkey,3, at one end thereof. Formed upon, or secured to,the key-lever at the upper edge thereof is the arm or upright B whichconstitutes the member to which the connecting rod C is secured. In theform thereof shown in Figs. 1, at and 5 of the drawings, the member B isslotted at one side near its upper end, as shown at 4, to receive a pinor projection, 5, upon the connecting-rod C, which connecting-rod in theform shown in said figgures, is longitudinally slotted or bifurcated atits lower end, as shown at 6, and-is adapted to receive between itsside-walls the upper end of the member B, which member engages the pinor projection 5 which extends transversely through said slotted portionof the member C. These two members are so constructed, that whenassembled, their outer edges will lie in coinciding planes, as mostclearly shown in Fig. 5. Shiftably supported upon one of these membersadjacent to the connecting end thereof, (herein shown as the uppermember 0,) is a locking-sleeve, D, open at one end and preferably of aninternal construction to correspond to the external form of theconnected ends of the twomembers, which locking sleeve or device isadapted to be slid into engagement with the connected ends of the twomembers, as shown in Fig. l, to impinge said members and retain them inlocked engagement one with the other. i

In the form shown in Figs. 1 to 5, this shiftable lock is in the form ofan inverted cup which closely but shiftably impinges the member C and isadapted toengage the connecting ends of both members to prevent lateraldisplacement of said members relatively to each other. One end of saidsleeveD is also constructed to form an abutment face, 7, adapted toengage the enlarged connecting end of the said member to limit themovement of said sleeve with relation to the said members, as will befully understood by retcrence to said figures.

Instead of forming the member B with a hook-shaped engaging end toengage a pin between the forks of the member 0, both of said membersmay, as shown in Figs. 6 and 7, be constructed with plain bearing faces,andone of said members be provided with a laterally projecting pin 5,which enters a hole formed through the other of said members, in whichcase the shiftable lock will be of the same cross-sectional forminternally as the external cross-sectional form of the connected ends ofthe members.

In assembling the two members, it is simply necessary to engage the pinor projection of one member within the slot or opening of the othermember by a lateral movement of said members, and subsequently shift theshiftable lock down over the two connected ends which will securely holdthe said members against displacement.

Ilaving thus described. my invention, I claim- In a connecting-device,the combination with two connecting members, one of which has anenlarged bifurcated connecting-end and has also a pin or studintersecting such bifurcation, and the other of which members is formedwith an end having a transverse recess engaging said pin or stud saidend of said member being adapted to fill the space formed by suchbifurcation and to be held against. longitudinal movement therein andagainst lateral movement upon one of its transverse axes and said memberalso being adapted to form with said first-mentioned member asubstantially solid structure, and a shit'table sleeve mounted forsliding movement upon said first-mentioned member and adapted to bestopped by the enlarged end thereof said sleeve also being adapted. toem brace and iuclose the connecting-ends of said members whereby themembers are held also against lateral movement upon their oppositetransverse axis, substantially as described.

JOHN M. FAIRFIELD.

\Vitnesses: FRED. J. DOLE, FREDERICK A. ROLAND.

